Yeah, I had one of these in my family as well. I didn’t do the DNA test but went on ancestry and kinda pieced stuff together way back to when the majority of the family tree crossed over the Atlantic. There’s maybe one or two people that are suspect (orphan like circumstances). I can’t follow their trees or place them but I don’t have strong confidence either of them were the missing Native American. It’s made harder by the common practice of making Native Americans take more English names.
I do wonder if the DNA testing could get it wrong in any case. There are so few Native Americans still alive to collect the DNA and really get a picture of “this is what Native American DNA looks like.” There were a lot of Native American nations before Europeans showed up … and a lot were driven to near extinction between smallpox and war.
I’m also the only man I know that’s got an effectively hairless chest naturally despite a lot of hairy European lineage… That’s been linked to Native Americans (or was at least more common) so maybe there is something to the stories. I don’t particularly want to take a DNA test to see what it would say.